+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   13970 (1991 RH27) Classification: Main-belt Asteroid          SPK-ID: 2013970 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: JPL 1 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .187224716809524 8.4055e-08   a 2.244514309986522 1.4492e-08 AU q 1.824285753924371 1.8976e-07 AU i 4.845142245729458 8.5641e-06 deg node 149.5090411148427 6.8662e-05 deg peri 167.9082181639909 7.0538e-05 deg M 187.2542951183982 1.9335e-05 deg tp 2456989.868271459583 (2014-Nov-28.36827146) 6.8552e-05 JED period 1228.236487100334 3.36 1.1895e-05 3.257e-08 d yr n .2931031635852971 2.8386e-09 deg/d Q 2.664742866048673 1.7205e-08 AU   Orbit Determination Parameters    # obs. used (total)      824      data-arc span      7886 days (21.59 yr)      first obs. used      1991-09-13      last obs. used      2013-04-16      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .56938      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 13:54:23   Additional Information  Earth MOID = .811207 AU   T_jup = 3.604  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.3 mag n/a PDS3 (MPC 39043)   13970 (1991 RH27)          Discovered 1991-Sep-13 by Holt, H. E. at Palomar (675) Reference: 20000320/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1991 RH27 = 1991 TA6 = 1997 GA39  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-22 20:08 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin